Street-sweeping and refuse-collecting machine



J W. JEMMISON STREET SWEEPING AND REFUSE COLLECTING MACHINE Filed July 15, 1922 2 Sheets-Sheet 1 1514.289 J. W. JEMMISON I STREET SWEEPING AND REFUSE COLLECTING MACHINE NOV- 4 Filed July 13, 1922 sir r orric 1e.

JOHN WILLIAM JEMMISON, OF HUDDERSFIELD, ENGLAND.

STREET-SWEEPING AND REFUSE-COLLECTING MACHINE.

Application filed July 13,

To all to 7mm it may concern Be it known that l, JoHN lViLLL-nr Juararrson, a subject of King George V of Great Britain, residing at Huddersfield, in the county of York. England have invented a new and useful. Improvement in Street Sweeping and Refuse-Collecting Machines,

of whichthe following is a specification.

This invention relates to street sweeping and refuse collecting machines of the type in which a brush, revolving in contact with. the road surface, is arranged tothrow the sweepings in a forward direction through an aperture into a casing containing a second brush, which acts to transfer the sweep ings either directly into a receiving receptacle, or into the path of a third brush by means of which they are transferred to the receiving receptacle.

prove. upon the method of carrying or mounting the road brush and to provide means to co-operate with said brush, whereby the sweeping action of the brush is improved and the sweepings removed from the road surface are more effectively dealt with.

According to the invention, the road brush is carried by arms which extend forwardly in a substantially horizontal direction and have their forward ends adjustably secured in suitably curved guides secured to the side walls of the transfer brush casing or alternatively are slotted and adjustably secured, to fixed bolts carried by the casing. As the diameter of the brush decreases through. wear, its axis can be adjusted forwardly and the point to which the sweepings are thrown by the rotation of the brush thus be kept constant without it being necessary to speed up the machine as the road brush wears as has been the case hitherto, the arrangement also serving to keep the brush more closely in contact with the road surface. The method by which rotary motionis conveyed to the brush is described later.

Also according to the invention the sweepings, instead of being thrown by the road brush on to a fixed plate inclining upwardly to the lower edge of the aperture leading into the transfer casing, are thrown on to a The invention has for its object to im-v 1922. Serial No. 574,711;

as a slowerbrush speed results in the sweepings not being thrown forward sufliciently far as the brush decreases in diameter through wear, this permissible slower speed only becomes practicable as a result of the adjustable method of mounting the road brush previously referred to.

In the accompanying drawings.

Fig. 1 is a side elevation of the relevant parts of a street'sweeping and refusecollecting machine, of the type to which the invention refers and having the present improvements applied; I

Fig. 2 is a plan view of the: rear part of the machine,the centre portion being broken away; a

Fig. 3 is a rear view, that is to say in the direction of the arrow A, Fig. 2, showing the parts constituting the improved brush mounting; i

'Fig. ,4 is a rear view of the pivoted plate by which the sweepin'gs thrown forward by the rear road brush are raised. into the path of the transfer brush, and of the means for operating said pivoted plate;

1 Fig. 5 is a longitudinal'section through the chambers 6 and 8, taken on the line 5-5 in Fig. 2. the drive chains and sprocket wheels taken in section through the shafts on the line 6-6 in Fig. 3.

Referring to the drawings, 1 represents the frame of the vehicle, supported by the "front and rear road wheels 2 and 3 I'GSPBC'.

tively. The rear road, brush is shown at 4. and it is arranged as usual to throw sweepings, raised from the road surface. through. an aperture 5 into the lower part of a chamber 6 containing a revolving transfer brush or paddle wheel 40. This paddle wheel or transfer brush carries the sweepings round and delivers them by centrifugal action through an opening 7 in the upper, part of the chamber 6. The opening 7 leads into the lower part of a second chamber 8 containing a second; revolving brushill which carries the sweepings round and delivers them by centrifugal action forwardly through an opening 9 in the upper part of the chamber 8 into a receiving receptacle 10 locatedbetween the front and rear road wheels of the vehicle.

The above parts areof known construction and operation and form no part of the method] of mounting or carrying the rear dis a detail view of present invention, which relates to the y road brush 4 and to means for more fectively delivering the sweepings, thrown forward by such brush, into the path of the transfer brush in the chamber 6.

Accordil'ig to the i. vention the rear road brush a is carried by a pair of arms 11, 11 one at each end thereof. These arms extend forwardly in a substantially horizontal direction and at its forward end one of the arms is pivotally connected to the lower end of a link 12. This link in the instance shown, has its upper end pivotally mounted at 13 on fixed pivot stud secured to the side wall of the casing constituting the chambers 6 and 8.

To maintain the brush 4 in its correct position, the forward ends of the arms 11, 11 are ad ustal'ly secured by means of bolts 14, in curved guides 15, 15 secured to the outer sides of the casing. Obviously, the arms 11, 11 might be slotted and the bolts ll be secured to the casing to attain the same end.

Motion is conveyed tothe road brush, as shown in Figs; 3 and 6, by a chain wheel 16 fast on the transfer brush axis 6 and connected by a chain 17 to a wheel 18 mounted on the pivot stud 13 of link 12'. A second wheel 19 (seeQFig. 3) fast with the wheel 18 conveys motion by a chain 20 to a wheel 21 loosely mounted on the bolt 14 connecting the lower end ofthe link 12 to the end of its brush arm 11, and another wheel fast with the wheel 21' conveys motion by a chain 23 to a wheel 24 fast on theaxis of the rear road brush. j c v Iii-addition to more effectively 1naintaining the road brush in contact with the road surface, the method of mounting the road brush above described enables me to readily compensate for wear of the brush. Hitherto, as the road brush has decreased in diameter owing to Wear, it has been necessary to speed up the machine in order to compensate for the increased distance the brush had to throw the sweepings to properly deliver them to the transfer casing. By appropriate adjustn ent of the bolts 1.4. in the curved guides 15, 15 the brush axis can be carried towards the casing, and the brush .be maintained effective, without any speeding up of the machine, until the fibres are worn almost completely away. The advantage of this andthe saving in brush renewals will be obvious. in order to maintain the correct dri ing-anger of the chain 20, the centre from which the curve of theguides 15-15 is struck is that of the pivet stud 13 of the link- 12 A further advantage presented by the mounting described is tlr adjustment of ther'oad brush to suit different cambe'rs of roads is rendered possible, Atpresent if a "road is heavily cambered there is a tendency for the brush, extending as it does at right angles to the directlon of travel, to throw the sweepings towards one side and deposit or leave a trail of sweepings behind one 1nd of the brush By means of the i oved niountin either end of the brush can be adjusted independently to be the requisite amount in advance of the opposite end to compensate for the effect of the camber.

As before stated, the method of mounting the roadhrush obviates the necessity for speeding up the machine to get a quicker peripheral speed of the brush asit becomes worn.

Actually the invention provides for a slower peripheral speed of the road brush by arranging that the sweepings instead of being thrown by the brush either directly through the aperture 5 or on to a fixed plate inclining upwardly to the lower edge of such aperture, are thrownon to a plate 25 pivoted at 26 to the brush casing and moved intermittently about its pivot by a rod 27 actuated in this instance by a cam 28 mounted on the axle vof the rear road wheel 3. Other means may be employedto give intermittent movements to the rod 27.

By suitably proportioning' the cam or otherwise arranging that the rod 27 is raised once during each determined distance of travel of the machine, any sweepings which may hav failed to, enter the chamber 6 through the aperture 5 under the impetus given to them by the road brush, and have consequently accumulated on the plate 25, will bev raised into the path of the transfer brush in chamber 6 and be carried forward by such brush.

To avoid the dropping back von to the road surface, of any sweepings which may have accumulated on plate25, in the event of the road brush beingarbitrarily raised from the roadsurface for any reason connecting devices29 are provided between the usual hand-operated brush raising gear and the lever 30 by means of which the cam 28 operates the rod 27,-sothat when the brush raisinggear is operated to raise the rear road brush 3 and the usual front pilot brushes, one of which is shewn at 31, the rod 27 and consequently the plate 25 will also be raised.

It will be recognized that theslow running of the rear road brush, made permissible bythe use of the intermittently moving plate 25, is made practically possible by the method of mounting the brushaccording to which the decreasing throw given to the sweepings as the brush decreases in diameter, can be compensated'for.

The details of construction and arrangement of the parts employed to carry the invention into practice may vary. v

Having thus described my invention, what I claim as new and desire to secure by Letter Patent is I lQIn' a street sweeping machine, the comhination, with a casing having an inlet for dust at its lower part of a stud projecting laterally from one side of the casing, a pair of horizontally arranged arms, a road brush journalled in the rear end portions of the said arms curved guides and connecting bolts between the front ends of the said arms and the said casin the said guides being curved concentric with the axis of the said stud and arranged below it and adapted to permit the said brush to be adjusted horizontally with respect to the said inlet, a radius link pivoted to the said stud and to one of the said connecting bolts, a driving wheel journaled on the said stud, means to rotate the said driving wheel, and driving mechanism operatively connecting the said driving wheel with the road brush.

2. In a road sweeping machine, the combination, with a casing having an inlet for dust at its lower part, and a road brush supported from the said casing and delivering into the said inlet and provided with means for revolving it and having also means for adjusting it horizontally with respect to the said inlet; of a receiving plate for dust pivoted to the said casing and forming the lower part of its said inlet, and means for oscillating the said plate intermittently as the machine is moved along without aflecting the adjustment of the road brush.

In testimony whereof I afiix my signature.

JOHN WILLIAM JEMMISON. 

